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1.2 Convection Currents and the Mantle

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Volcabulary

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Heat transfer- movement of energy from a warm object- three types,radiation,conduction,and convection
Radiation- transfer of energy through empty space
Conduction- transfer by direct contact of particles of matter
Convection- transfer by the movement of a heated fluid
Density- a measure of how much mass there is in a volume of a substance
Convection current- the flow that transfers heat within a fluid

Outline

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Radiation

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• transfer energy through empty space
  • energy from sunlight and fire

Conduction

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• transfer by contact of particles of matter
  • makes other things hot

Convection

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• transfer by movement of a heated liquid
  • heating up liquid

Convection in Earth's Mantle

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• heat source for convection currents comes from the core
  • convection currents have been running for more than 4 billion years!!!